This is actually from Harry Potter 2, outside Gloucester Cathedral
Really odd to see Snape walking about in bright sunlight.  It really does make him look very pale.  Under lighting the paleness doesn't really show.
Both shots came from the bonus 'COS' DVD
I love this shot, it is so unrestrained.  Something Jason must have said made him laugh.
I've no idea where this came from, so if it is yours and you want it removed please email me
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